Hello World Cloudformation Template

hello_cloudformation.yml

AWSTemplateFormatVersion: 2010-09-09

Description: Deploys a basic httpd hello world app in an EC2 instance, create and attach a security group for the instance

Mappings:
  Infra:
    Vpcs:
      Main: vpc-xxxx
    Subnets:
      Public:
      - subnet-xxxx
      - subnet-xxxx

Resources:
  # Security Group
  AppSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupName: webapp-hello-security-group
      GroupDescription: Web App Security Group, HTTP traffic in, all traffic out, SSH enabled
      VpcId: !FindInMap [Infra, Vpcs, Main]
      SecurityGroupIngress:
      - CidrIp: 0.0.0.0/0
        IpProtocol: tcp
        ToPort: 80
        FromPort: 80
      - CidrIp: 0.0.0.0/0
        IpProtocol: tcp
        ToPort: 22
        FromPort: 22

  # App Instance
  App:
    Type: AWS::EC2::Instance
    Properties:
      # Hello Aws Community AMI
      ImageId: ami-8b5bb6e8
      InstanceType: t2.micro
      KeyName: ec2-key-name
      SubnetId: !Select [ 0, !FindInMap [Infra, Subnets, Public] ]
      SecurityGroupIds:
      - !Ref AppSecurityGroup
      Tags:
      - Key: Environment
        Value: test
      - Key: Role
        Value: web
Outputs:
  App:
    Description: App Instance
    Value: !Ref App
  AppUrl:
    Description: App Endpoint
    Value: !GetAtt App.PublicDnsName

$ aws cloudformation create-stack --stack-name MyHelloWorld --profile aws-profile-name // create stack
$ aws cloudformation update-stack --stack-name MyHelloWorld --profile aws-profile-name // update stack
$ aws cloudformation delete-stack --stack-name MyHelloWorld --profile aws-profile-name // delete stack
$ aws cloudformation describe-stack-events --stack-name MyHelloWorld --profile aws-profile-name // view stack event logs